Recent content by eh87

Hmm. Maybe I did something wrong before. Anyway, I checked on the response to a step function in rltool today and it seemed fine. I guess now I'll work on tweaking it to make it faster without losing stability, then re-post. Thanks!

Thanks for the reply :) Yes, they are in the LHP but I don't think it's stable for all gains. I know that as long as they don't cross into the RHP it should be, but this is just confusing. Please see the attached picture. In rltool, when I move the pink dots (gain) it seems like there's...

Homework Statement I'm trying to analyze the root locus of this transfer function in Matlab to control a DC motor: mysys=tf([0.022],[0.00000000007 0.0000000626 0.000493]) The Attempt at a Solution Using: %[Kp,P]=rlocfind(mysys) %rltool(mysys) rlocus(mysys) I get a root locus...

Hey thanks for your help. The second part of the problem asks for a transfer function of X(s)/V(s) and he said in class that there's an inductor somewhere with inductance L and resistance R, so I know for sure there's an electrical part to it somewhere.

Homework Statement Please refer to the image attached for problem statement and diagram. There's an inductor somewhere, but I have no idea where and I don't know how to accommodate for it. I can also see that there's another energy storage device, the spring on the right. I have no idea...

So I worked on it some more, just trying to understand the darn thing.. and yes, V_{b} = 0.0551898 m^3. Now which formula to use for boundary work? For constant temp and an ideal gas, I know the formula: W_{b} = \intmRT/VdV = mRT*ln(V_{2}/V_{1}) But prof said that for real gases...

I just read the sticky about homework. Sorry.

Hello :) I'm having trouble working on this homework question (please see attachment). The answers are supposed to be a) 22.61 KJ b) 36.79 KJ c) 151.8*C I solved (a) and I noticed that the answer to (c) is that saturation temperature at 500kPa, but I just cannot get (b)! In fact, I'm...